Waterproof concrete and process of making same



106. COMPOSITIONS, Examine i 132 r s 1 8 COATING R PLASTIC. erics 4 'n d"Jame- 930 l 1,744,869

UNITED STATES 4 i ROY CROSS, OF KANSAS CITY, MISSOURI, ASSIGNOR TO SILICA PRODUCTS 00., OF LOS ANGELES, CALIFORNIA, A CORPORATION OF DELAWARE WATERPROOF CONCRETE AND rnoonssor MAKING No Drawing. Application filed April 20, 1925. Serial No. 24,887. p V

This invention relates to improvements in tions, particularly with the use of a light'fillwaterproof concrete and a method for pro- 'ersuch as cinders or heat sintered clay, to ing ducing same, and refers more particularly to corporate the bituminous material as an ad- 5 a concrete in which an asphaltic or bitumiditional waterproofing material to a gelati- 5 nous substance is thoroughly interspersed nous clay waterproofing which improves the through the voids of the set concrete by being mixing quality of the lighter fillers into the incorporated in the mix in a pulverulent state vconcrete mix and prevent Stratification of the and subsequently being fused by heat in or-. ingredients in addition to having the eifect der to close or seal the voids created by the of waterproofing the set concrete. Bitumi r l evaporation or elimination of water from set nous material incorporated into a mix of this concrete. character, containing agelatinizing 1 clay, w The invention has a particular adaptation would have the'advantage of supplying addito concrete blocks or forms, floors or walls, tional strength to the set material in that it including covering material for girders and would serve as a bondin medium when beams in which the concrete mix is made of fused. It will be understoo that the bitumirelatively porous material or to concrete of nous material may-be used without the clay in any character which is to be waterproofed. a concrete aggregate utilizing a light filler The invention will improve materially the such as heat treated clayor cinders, but it has character of lightweight concrete at the presbeen found that a more satisfactory mix can I ent time being adapted on a large scale for be repared where the gelatinining clay is 70 both interior and exterior walls and for steel use beam coverings in which the aggregate is A typical bituminous material that would formed of a porous material such as a con-v; be useful for this purpose would be a brown 1 crete mix containing as a filler cinders, Hay-Y. owdered as halt such as has been found dite (a clay or ceramic material heated to naturally in llolorado. This asphalt is in e intumescence). -f dry, pulverulent condition having the ap- As mentioned, the purpose of this invention pearance of diatomaceous earth. Such an is to make a formed ob ect of concrete such va h lt, dily disintegrates between the finas concrete blocks, monolithic forms includgers and can be pulverized to a high degree of ing wall construction, floors, pavement wear-v, fineness. -There also occur certainnaturalas- 1 ing surface, etc., in which bituminous matephalts appearing as black masses often with rial having a melting point between air tem-., ll id l i t which may b pulverized perature' and 400. F. is used. This bitumi-l to produce a wet brown-pulverized bituminous material would be incorporated in a sufo mate ial for this purpose. Artificial ficient quantity in the wet mix in a solid pulmaterials may be prepared by disintegrating verulent or dispersed form. The concrete soliibggg wglesidpes and Sem1-S0lld would set in the normal manner as there is @3 10 rggl p gs pr uce from a pH 'alt c i nothing 1 in the bituminous material which 7 or petroleum residues. r Such materials typi- 4 1 would have a retarding effect. After being cal of the above would includethe followmg m thoroughly set, the concrete would then be. Qggpha nite, Tgip idggl gmlb entmbaked at a temperature suflicient to cause the ijse gilsonite, ermudez M g galgandsn-ther bituminous material to fuse. This fused sub na nWOHH aiidifsfhfisolid ha also stance, in a liquid or semi-liquid state ressure' ti -v throughout the body of the concrete, would ar 1 c osfilfsa seep or intersperse itself throughout the voids solid or semi-so 1 of the concrete,acting as an additional ce- Such materials may be pulverlzed to a menting material and giving to the concrete brownish black powder or Inna-y be ground in 0 01 a CO material complete waterproof property. the resence of water to a c It i f advantage, under certain cond1-' K typical mlxture as used for maEng one cubic foot of light waterproofing, yet strong,

concrete would be as follows:

Pounds Portland cem nt 12 Fine re ate preferably cinders or ay te c ay or ceramic products heated to ntumescence), passing a mesh screen Coarse a re ate preferably such' a's" Haydfle or cinders retalned ona 'f mesh screen 48 1 ng, a 1 orma and Colorado Water in'suflicient quantities to give'a uniform p astic mix and not enough to cause segregation of the aggregate and water.

:matur'eor 'i mmediate contact of the clay and if i "A desirable metho 'is to'thoroughlyj mix 'the gelatinizing clay with the disintegrated bitumen before adding them to the other ingredients; This will retard or pre'yent prei T 'water, As described, the gelatinous clay 3 -'maybe omitted if desired where a uniform P a t mix can be produced without it, as

'in the case of a richmix'of sand androck Z concrete.

035 j'tocpn crete where the common type of heavier aggregate, such as limestone or naturalrock r f ders tood that the invention is as applicable s.u d- .,.,,Q I cla m as my invention}:

WhiIe the invention has been described f H morecompletely in connection with the preparation .of light-weightconcrete, it is un- 1.A concrete mix comprising hydraulic cement, mineral aggregate, a gelatinizing clay and solid bitumen in a pulverulent' con- :ditionfca pable of filling the a oid f concrete.

2QSet concrete comprising hydraulic ce- 045 ment,a mineral aggregate, a gelatinizing clay has fand a solid bituminous material fused into the fivoids of the concrete.

.Proofing material fused into the'voids of th concrete.

. 4. A process of making waterproof ckxcrete consisting in preparing {a'i'nix cont'ain- 7 :i g hy fl e t,amineral aggregate, f, j: -11 gelatim'zing clay and a bituminous matei I -rial in a discrete form, permitting the mix to set and heating to a temperature to fuse the :bitum'in'ous material. 5 r I 3., Fformed objects of concrete containing Thydraulic cement, a mineral aggregate, a V gelatinizing clay, and having a solidlwater- 

